Repair device for pneumatic tires.



No. 746,207.' Y V l PATENTBD DBG.8,1903. A

J. R. VOISBURGH.

iREPAIR DEVICE FOR- PNEUMATIG TIRES. V' APPLICATION FILED SEPT. 1o. 1903.

N0 MODEL.

UNITED STATES Patented ecember 8, 1903.

PATENT OFFICE.

`REPAIRDEVICE FOR PNEUMATIC TIRES.

SPECIFICATION forming part of Letters 'Patent No. 746,207, dated December 8," 1903.

\ .Application filed September 10, 1903. Serial No. 172.635. (No model.)

To all whom. it may concern/.-

Be it known that I, JOHN R. VosBURGH, a citizenof the United States, residing at Johnstown, in the county of Fulton and State of New York, have invented certain new and useful Improvements inRepair Devices for Pneumatic Tires and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledV in the art to which it appertains to make and use the same.

My invention is an improved repair device for pneumatic tires; andit'co'nsists in the novel features hereinafter described, reference being had to, the accompanying drawings, which illustrate one form in WhichI'have contemplated embodying the invention, and vsaid invention is fully disclosed in the following` description and claims.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 represents a side elevation, partly in section, of the'improved gmushroom or umbrella plug forming a part of the repair device. Fig. 2 represents a plan view of the retaining and protecting plate, also forming part of the repair device. Fig. 3 represents a sectional view of the said plate. Fig.4 is a view representing in section a portion of the pneumatic tire, showing a plug after insertion therein. Fig. 5 is a view similar to Fig. 4., showing the retaining and protecting plate applied to the stem of the plug. Fig. 6 is a similar view showing thepstem of the-'plug cut off flush with the outer surface of the retaining and protecting plate. Fig. 7 is a sectional view of the retaining-plate, illustrating a modied construction. Fig. S represents a modified form of plug.

The object of my invention is to provide a convenient means for quickly and permanently repairing al pneumatic tire whichhas been punctured. For this purpose I employ a soft-rubber plug of the general .form illustrated in Fig. 1, having a large head, which may be round or of any other Vdesired con, figuration and is provided with acone-shaped outer face, said plug having an elongated stein of less diameter than the enlarged head.

In the drawings, A represents the plug as aV whole; 0., the enlarged head, having theouterv conical surface a', forming a point d2, and a3 represents thel elongated stem of the plug.

erably hollowed out in concave f0rm,as shown `in Fig. 1, forming a recess a4 for the purpose of better holding the cement, by means of which the head is firmly united to the inner face of the tire. These plugslA` are made with varying sizes of heads aand with stems 0.3 of diiferent diameters forthe purpose of closing punctures of different sizes, in accordance with the circumstances of the repair job for-which they are employed.

B represents the retaining Aand protecting plate. (Illustrated in detail in Figs. 2 and 3.) Thisplate is shown in `the present instance as .beingof circular form; but it may be of any other desired configuration, and it is preferably'made convex on one side and concave on the other, so as to adapt it to conform to the exterior of a pneumatic tire. This plate B is provided, preferably in the center, with an aperture b, preferably of circular form, which is adapted to be forced upon stem 01.3 of the rubber plug, and the aperture in said plate is made smaller than that portion of the stem of the plug with which it is used, which is adjacent to the head, so thatan indentation will be made around the stem when the plate is forced upon the same. y This stem as ofthe plug is preferably vmade, tapering slightly in order to facilitate the placing of the plate B upon the same. The plate `B is also provided on its convex side with an annular depression b,surrounding the aperture b, forminga recess. This annular recess orv The inner face of the enlarged head a is prefplate so formed maybe stamped by a single operation.

ferred. The plate B'is made in various sizes and with aperturesb and recesses b of various sizes to accommodate the various sizes of .first roamed out neatly, preferably by means of a red-hot piece of iron or wire, so as to leave a round hole. p One of the mushroom The annular recess may, howy ever, be performedin,other ways, if preor umbrella plugs A is then selected accord; ing to the size of the aperture to be plugged, it being desirable to have the stem cts of the plug t tightly in said aperture. The head and a portion of the stem adjacent thereto are then coated with cement and the concave recess t4 is well filled with the same, which may be conveniently accomplished by dipping the head of the plug in the cement, and the point (t2 of the head of the plug is inserted in the aperture of the tire C and the head forced through said aperture by means of a suitable tool, when the head will expand and the parts will be in the position illustrated in Fig. Lt. By reference to this figure it will be observed that the peripheral edges of the head of the plug will engage the inner surface of the tire before the interior portions of the concave inner face, and the concave recess d will serve to hold a quantity of the cement, which is indicated at CZ. The plate B is then placed in engagement with the stem of the plug by passing the end of the tapering stem through the aperture b, and the operator will force the plate B down the stem 0f the plug toward the head and at the same time pull upon the stem, so as to flatten the mushroom head of the plug against the inner Wall of the tire. By pressing the plate B down iirmlyin the manner described it Will be caused to substantially embed itself in the outer face of the tire, so that-the outer face of the plate is substantially iush with the outer face of the tire, as shown in Fig. 5. The central aperture l) of the plate B being smaller than the stem of the plug, the edges of said aperture will embed themselves in the stem of the plug, as shown in Fig. 5, thereby giving the plate B a firm hold upon the stem. The portions of the stem immediately above the aperture of the plate will engage the annular recess b on the outer face of the plate, as also shown in Fig. 5, thus assisting in holding the plate and stein rigidly together. To complete the repair, it is only necessary to cut otf the stem a? of the plug above the portion which lies in the annular recess b' and flush with the outer face of the plate, as shown in Fig. 6, thus forming a very strong and durable repair.

The plate B is preferablymade of thin sheet metal; but it may be made of any other material which may be found suitable for the purpose.

In Fig. 7 I have illustrated a slight modication of the retaining and protecting plate. In this ligure the plate B is provided with an aperture h2, through which the stem of the rubber plug is passed. The material of the plate surrounding the aperture b2 is depressed around the said aperture to form a short annular collar,which is provided interiorly with an annular groove or recess h3, above which is an annular shoulder h4 of substantially the diameter of the aperture b2. The plate B' is also provided with an annular depression or recess b5, surrounding and above the annular portion b4. When this form of the plate is employed, the stem of the plug will be contracted where it passes through the aperture b2 and the annular portion b4 and will expand into the annular groove or recess b3 and the annular recess b5, thereby giving the plate a' firm grip on the stem of the plug. p The stein of the plug will also be coated with cement adjacent to the head and the cement will unite the stem to the plate and further assist in holding the parts permanently together.

Fig. 8 represents a slightly-modified form of plug. In this figure, A represents the plug, having the long tapering stem a5 and the mushroom or umbrella shaped head d6. Phe inner face of the head is convex, as shown at a7, and is provided with an annular recess as around the base of the stem, the outer con- Vex face being slightly swelled, as at d", to afford the necessary material to provide for this recess d8 without weakening the plug. This form of plug will allow the stem to be drawn up through the metal plate to better advantage, and the recess a8 will insure a quantity of cement beingappliedto the edges of the aperture in the tire and around the base'ot the plug.

What I claim, and desire to secure by Letters Patent, is-

l. In arepair device for pneumatic tires the combination with a plug of elastic material provided With an enlarged head and a stem, of a non-elastic plate provided With an aperture adapted to be forced upon and permanently secured to the stem, substantially as described.

2. In arepair device for pneumatic tires the combination with a plug of elastic material having an enlarged head and a stem,of a nonelastic plate provided with an aperture to engage said stem, and having recess in its outer face surrounding said aperture, substantially as described.

3. In a repairdevice for pneumatic tires the combination with a plug of elastic material provided with an enlarged head havinga con Vex outer face, a concave inner face, forming acement-holding recess, and a tapering elongated stem, of a permanent retaining-plate of non-elastic material provided with an aperture adapted to be forced upon the said stein, substantially as described.

4. In a repair device for pneumatic tires,the combination with a plug of elastic material having a stem and a head of larger diameter than the stem, of aretaining-plate having an aperture for the passage of the stem, and an annular collar around said aperture having an annular groove or recess to receive portions of the stem and assist in holding the plate upon said stem, substantially as described 5. In a repair device for pneumatic tires,the combination with a plug of elastic material having a stem and a head of larger diameter than said stem, of a retaining-plate havinga central aperture and a collar formed around IOO concave on the side adjacent to the stem and xo being provided with" an annular recess surroundng the stein,substantally as described. In testimony whereof Iafx my signature in the presence of two witnesses.

. JOHN R. VOSBURGH.

, Witnesses: HARWooD DUDLEY, JOHN M. RUSSELL. 

